You're performing either ANSI 89 style joins. Instead, you should use the ANSI 92 style
SELECT ...
FROM TABLEA AS a
JOIN TABLEB AS b
ON a.ID = b.ID
LEFT JOIN TABLEC AS c
ON b.NewID = c.NewID
LEFT JOIN ...
WHERE...
This way you separate JOIN criteria from the filtering operations of the WHERE clause.
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SQL Server Execution Plans
SQL Server Query Performance Tuning